struct isis_area *
isis_area_create ()
{
struct isis_area *area;
area = calloc(1, sizeof (struct isis_area));
/*
* The first instance is level-1-2 rest are level-1, unless otherwise
* configured
*/
if (listcount (isis->area_list) > 0)
area->is_type = IS_LEVEL_1;
else
area->is_type = IS_LEVEL_1_AND_2;
/*
* intialize the databases
*/
area->lspdb[0] = lsp_db_init ();
area->lspdb[1] = lsp_db_init ();
spftree_area_init (area);
area->route_table[0] = route_table_init ();
area->route_table[1] = route_table_init ();
#ifdef ENABLE_IPV6
area->route_table6[0] = route_table_init ();
area->route_table6[1] = route_table_init ();
#endif /* ENABLE_IPV6 */
area->circuit_list = isis_list_new ();
area->area_addrs = isis_list_new ();
flags_initialize (&area->flags);
/*
* Default values
*/
area->max_lsp_lifetime[0] = MAX_AGE; /* 1200 */
area->max_lsp_lifetime[1] = MAX_AGE; /* 1200 */
area->lsp_gen_interval[0] = LSP_GEN_INTERVAL_DEFAULT;
area->lsp_gen_interval[1] = LSP_GEN_INTERVAL_DEFAULT;
area->lsp_refresh[0] = MAX_LSP_GEN_INTERVAL; /* 900 */
area->lsp_refresh[1] = MAX_LSP_GEN_INTERVAL; /* 900 */
area->min_spf_interval[0] = MINIMUM_SPF_INTERVAL;
area->min_spf_interval[1] = MINIMUM_SPF_INTERVAL;
area->dynhostname = 1;
area->oldmetric = 1;
area->lsp_frag_threshold = 90;
/* FIXME: Think of a better way... */
area->min_bcast_mtu = 1497;
return area;
}
void
isis_event_system_type_change (struct isis_area *area, int newtype)
{
struct listnode *node;
struct isis_circuit *circuit;
Log(LOG_DEBUG, "DEBUG (default/core/ISIS ): ISIS-Evt (%s) system type change %s -> %s\n", area->area_tag,
circuit_t2string (area->is_type), circuit_t2string (newtype));
if (area->is_type == newtype)
return; /* No change */
switch (area->is_type)
{
case IS_LEVEL_1:
if (area->lspdb[1] == NULL)
area->lspdb[1] = lsp_db_init ();
lsp_l2_generate (area);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1)
{
lsp_db_destroy (area->lspdb[1]);
}
else
{
lsp_db_destroy (area->lspdb[0]);
}
break;
case IS_LEVEL_2:
if (area->lspdb[0] == NULL)
area->lspdb[0] = lsp_db_init ();
lsp_l1_generate (area);
break;
default:
break;
}
area->is_type = newtype;
for (ALL_LIST_ELEMENTS_RO (area->circuit_list, node, circuit))
isis_event_circuit_type_change (circuit, newtype);
spftree_area_init (area);
lsp_regenerate_schedule (area);
return;
}
